A rear longitudinal beam energy absorption box laser welding device and welding process

Abstract

The application discloses a rear longitudinal beam energy absorption box laser welding device and welding process, and relates to the technical field of laser welding devices.The device comprises a servo motor, the output end of the servo motor is rotationally connected with a transmission part, the end of the transmission part away from the servo motor is rotationally connected with a rotating shaft, the side of the rotating shaft close to a moving assembly is rotationally connected with a protective shell, the protective shell is fixedly connected with the moving assembly, the outer side of the protective shell is fixedly connected with a compression spring, the end of the compression spring away from the protective shell is fixedly connected with a fixing ring, the outer side of the rotating shaft close to the fixing ring is fixedly connected with a circular ring, and the end of the rotating shaft away from the moving assembly is fixedly connected with a welding part.The rear longitudinal beam energy absorption box laser welding device and welding process are characterized in that the fixing ring and the circular ring are meshed, the welding part stops rotating and deviating, and a self-locking effect is achieved, so that the welding gun angle deviation caused by external factors can be effectively prevented, and the welding work can be normally carried out under various working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding equipment, and in particular to a laser welding device and a welding process for a rear longitudinal beam energy absorption box. Background Art

[0002] With the increasing popularity of automobiles and the improvement of people's living standards, people are increasingly focusing on vehicle safety performance, with collision avoidance being a particular priority. Current vehicle designs typically utilize bumper systems installed at the front and rear of the vehicle to protect the vehicle's structural frame from serious damage in low-speed collisions, thereby ensuring the safety of both the occupants and the vehicle's main structure. To maximize the absorption of impact energy, current bumper systems often incorporate a deformation element, known as a crash box.

[0003] In related technologies, an energy absorption box includes a support plate and a fixed frame, which together form an installation box. The installation box is equipped with a shock-absorbing and buffering mechanism to cushion the vibrations generated by a vehicle collision. The connection between the fixed frame and the support plate typically requires welding. Workers often manually align the support plate and fixed frame before welding. This manual alignment can cause wobbling, which can lead to significant deviations in the weld position. Summary of the Invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rear longitudinal beam energy absorption box laser welding device includes a base, the outer side of the base is fixedly connected to a drive motor, the top of the base is provided with a square hole, the inside of the square hole is rotatably connected to a screw, the screw passes through the square hole and is fixedly connected to the drive motor;

[0005] The moving component is fixedly installed on the top of the base and is located at the rear end of the square hole;

[0006] Welding assembly, the welding assembly is fixedly mounted on the moving assembly;

[0007] The fixing component is fixedly installed on the top of the base, the fixing component and the square hole are located on the same vertical plane, and the outer side of the fixing component is fixedly connected to the motor;

[0008] A positioning component, the positioning component is slidably connected to the square hole;

[0009] The servo motor is connected to the transmission part at the output end of the servo motor, and the servo motor is fixedly installed on the outside of the moving part. The end of the transmission part away from the servo motor is rotatably connected to the shaft. The shaft is rotatably connected to the moving part. The shaft and the servo motor are located on two adjacent surfaces of the moving part. The side of the shaft close to the moving part is rotatably connected to the protective shell. The servo motor is connected to an external power supply to work. The servo motor drives the shaft to rotate through the transmission part, and the shaft drives the ring to rotate. The ring and the fixed ring are relatively squeezed, so that the compression spring is compressed and deformed by pressure, so that the fixed ring moves on the outside of the shaft toward the direction away from the ring, so that the ring drives the welding part to rotate, and then the inclination angle of the welding part is adjusted. After adjustment, the servo motor stops working, and the fixed ring is reset under the elastic force of the compression spring. At this time, the fixed ring and the ring are meshed with each other, and the welding part stops rotating and deviating, which plays a self-locking role. The inclination angle self-locking can ensure that the welding part always remains at the set precise inclination angle, and the welding part The gun angle changes during the welding process, which will lead to uneven distribution of laser energy, and may cause problems such as uneven weld width and inconsistent penetration depth. The self-locking function effectively avoids this situation, thereby ensuring the stability of welding quality and improving the strength and sealing of the weld joint. The stable tilt angle is conducive to the formation of high-quality welds. When the angle is fixed, the laser energy can act evenly on the welding part, making the weld penetration, penetration width and other parameters more uniform, reducing the occurrence of welding defects. The protective shell is fixedly connected to the moving component, and a compression spring is fixedly connected to the outside of the protective shell. The end of the compression spring away from the protective shell is fixedly connected to a fixed ring, and the outer side of the rotating shaft near the fixed ring is fixedly connected to a circular ring. The fixed ring is slidably connected to the rotating shaft, and the end of the rotating shaft away from the moving component is fixedly connected to the welding part. The contact surface of the fixed ring and the circular ring is a gear meshing setting. By setting the meshing between the fixed ring and the circular ring, the welding gun angle deviation caused by external factors can be effectively prevented, ensuring that the welding work can be carried out normally under various working conditions.

[0010] Preferably, the moving assembly includes a horizontal axis, which is fixedly mounted on the top of the base, the top of the horizontal axis is slidably connected to the longitudinal axis, and the outer side of the longitudinal axis is slidably connected to the moving axis. After the material is fixed, the longitudinal axis moves on the horizontal axis, the moving axis moves on the longitudinal axis, and the moving plate moves on the moving axis, so that it can move in three directions, so that the welding assembly moves to the welding position, the horizontal axis, the longitudinal axis and the moving axis are arranged perpendicular to each other, the outer side of the moving axis is slidably connected to the moving plate, the top of the moving plate is fixedly connected to a connecting belt, and the moving plate is rotatably connected to the rotating shaft.

[0011] Preferably, the welding part includes a fixing plate, which is fixedly connected to the rotating shaft, and the bottom of the fixing plate is fixedly connected to the welding gun, and the outer side of the welding gun is fixedly connected to the bracket. Since the energy absorption box is placed horizontally, welding is performed in the vertical direction at this time. When the moving assembly drives the welding assembly to the welding position, the limit plates on both sides of the welding gun are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position, which greatly reduces the position deviation of the welding gun caused by human operation errors or equipment vibrations, improves the quality of the welding joint, and reduces the probability of welding defects such as incomplete welding and welding deviation. The end of the bracket is fixedly connected to the limit plate, and the number of the limit plates is two. The two limit plates are symmetrically arranged with the bracket as the center, and the angle between the two limit plates is a right angle. The limit plates on both sides are vertically arranged. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the materials to be processed provides stable support and constraint for the welding gun, so that it can maintain a relatively static state during welding, reducing unnecessary shaking and displacement, and ensuring that the welding gun can stably act on the welding part, thereby making the parameters such as the weld depth and weld width more uniform and stable, which is conducive to improving the welding quality. The fixed plate is fixedly connected to the outside of the limit plate near the limit plate, and the side plate is fixedly connected to the limit plate. The limit plate is fixedly connected to the side of the welding gun near the welding gun with a bent plate.

[0012] Preferably, the fixing assembly includes a support plate, which is fixedly mounted on the top of the base, and a fixed seat is fixedly connected to one side of the support plate near the square hole. A through hole is opened on the outside of the fixed seat, and there are multiple through holes, which are evenly distributed with the fixed seat as the center. A spring plate is fixedly connected to the inside of the through hole, and the spring plate is L-shaped, with one end of the spring plate located inside the inclined groove. In the initial state, under the elastic force of the spring plates on both sides, the spring plate is squeezed between the inclined groove and the moving block. Under the action of the squeezing force, the moving block is located near the middle of the round rod, and the workpiece to be processed is moved. The material is placed inside the fixed seat, and the energy absorbing box is sleeved on the outside of the round rod. The energy absorbing box and the moving block are in contact and squeezed, so that the moving block moves away from the energy absorbing box, thereby clamping the material. Since the energy absorbing box is mostly irregular or cylindrical in shape, by setting the spring plate, multiple moving blocks clamp the energy absorbing box in multiple directions, so that the clamping force can be evenly distributed, and then in the processing process, the energy absorbing box is prevented from being displaced and shaken due to external force, which affects the processing accuracy and reduces the product quality. The movable block is connected with the movable block in a sliding manner, and the spring plate is symmetrically arranged with the movable block as the center. An inclined groove is provided on the side of the movable block close to the elastic plate. The inner wall of the through hole close to the inclined groove is fixedly connected with a limiting block. The limiting block is symmetrically arranged with the movable block as the center. A cylinder is fixedly connected with the inner wall of the through hole. An annular hole is provided in the middle of the outer side of the movable block. The cylinder is located inside the annular hole. The fixed seat is fixedly connected to the motor. The motor is connected to an external power supply to work. The motor drives the fixed seat to rotate. The friction between the fixed sleeve and the circular plate drives the energy absorption box and the frame to rotate, thereby welding the material. A round rod is fixedly connected to the middle part of the fixing seat, and a return spring is fixedly connected to the end of the round rod away from the fixing seat. By setting the return spring, the energy absorption box is in close contact with the frame to prevent gaps or loose contact at the welding point, which will cause uneven filling of the welding molten pool and easily produce welding defects such as air holes, slag inclusions, and incomplete welding, thereby reducing the strength of the weld joint, affecting the energy absorption and force transmission performance of the energy absorption box at critical moments, and failing to ensure the collision safety of the vehicle. A fixed sleeve is provided on the outer side of the round rod near the return spring, and the fixed sleeve is slidably connected to the round rod.

[0013] The positioning assembly includes a slider, which is slidably connected to the inner wall of the square hole, and the slider is threadedly connected to the screw. The top of the slider is fixedly connected to the square plate, and the frame welded to the energy absorption box is placed on the circular plate. Bolts are placed inside multiple circular holes on the side of the frame to position and fix the frame, which is convenient for loading and unloading. After the frame and energy absorption box are placed, the drive motor is connected to an external power supply, and the drive motor drives the screw to rotate. The screw drives the slider to move inside the square hole toward the direction of the fixed assembly, so that the fixing sleeve contacts the circular plate, thereby docking the energy absorption box and the frame. The inside of the square plate is rotatably connected to the circular plate, and a circular hole is opened on the outside of the circular plate, and a threaded groove is provided inside the circular hole.

[0014] A laser welding process for a rear longitudinal beam energy absorption box includes the following steps:

[0015] S1. Fix the material. Place the material to be processed inside the fixed seat. The energy absorbing box is sleeved on the outside of the round rod. The energy absorbing box and the moving block are in contact and squeezed. Under the elastic force of the spring plate, multiple moving blocks clamp the energy absorbing box in multiple directions.

[0016] S2, angle adjustment, the servo motor drives the shaft to rotate, the shaft drives the ring to rotate, the ring and the fixed ring are squeezed relative to each other, the compression spring is compressed and deformed, so that the fixed ring moves away from the ring, and the ring drives the weldment to rotate;

[0017] S3. Mobile positioning: When the mobile assembly drives the welding assembly to move to the welding position, the limit plates on both sides of the welding gun are in contact with the two materials to be welded, so that the welding gun can be accurately positioned at the welding position;

[0018] S4. Welding materials: The motor drives the fixed seat to rotate, and the friction between the fixed sleeve and the circular plate drives the energy absorption box and the frame to rotate, thereby welding the materials.

[0019] The present invention provides a laser welding device and welding process for a rear longitudinal beam energy absorption box. It has the following beneficial effects:

[0020] 1. The laser welding equipment for the rear longitudinal beam energy absorption box has a self-locking function by engaging the fixed ring and the circular ring, which stops the rotation and deviation of the welded parts. The self-locking of the tilt angle can ensure that the absorption welding parts always maintain the set precise tilt angle.

[0021] 2. The laser welding equipment for the rear longitudinal beam energy absorption box is conducive to forming high-quality welds through a stable tilt angle. When the angle is fixed, the laser energy can act evenly on the welding part, making the parameters such as the weld depth and weld width more uniform and reducing the occurrence of welding defects.

[0022] 3. The laser welding equipment for the rear longitudinal beam energy absorption box contacts the two materials to be welded through the limit plates on both sides of the welding gun, so that the welding gun can be accurately positioned at the welding point, greatly reducing the position deviation of the welding gun caused by human operating errors or equipment vibration, and improving the quality of the welded joint.

[0023] 4. The laser welding equipment for the rear longitudinal beam energy absorption box is vertically set through the limit plates on both sides. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the material to be processed provides stable support and constraint for the welding gun, allowing it to remain relatively static during welding, reducing unnecessary shaking and displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the external structure of a laser welding device and welding process for a rear longitudinal beam energy absorption box according to the present invention;

[0025] Figure 2 This is another side view structural schematic diagram of the present invention;

[0026] Figure 3 It is a schematic diagram of the local structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the mobile component of the present invention;

[0028] Figure 5 This is a schematic diagram of the welding assembly structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the weldment structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the fixing assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the fixing assembly of the present invention;

[0032] Figure 9 This is a schematic diagram of the partial structure of the fixing assembly of the present invention;

[0033] Figure 10 This is a schematic diagram of the positioning component structure of the present invention;

[0034] Figure 11 Schematic diagram of the welding process of the present invention.

[0035] In the figure: 1. Base; 2. Moving assembly; 21. Horizontal axis; 22. Vertical axis; 23. Moving axis; 24. Connecting belt; 25. Moving plate; 3. Welding assembly; 31. Servo motor; 32. Transmission element; 33. Protective shell; 34. Compression spring; 35. Fixing ring; 36. Circular ring; 37. Rotating shaft; 38. Welding element; 381. Fixing plate; 382. Welding gun; 383. Bracket; 384. Limiting plate; 385. Bending plate; 386. Side panel; 4. Fixing assembly; 41. Support plate; 42. Fixing seat; 43. Round rod; 44. Fixing sleeve; 45. Return spring; 46. Ring hole; 47. Moving block; 48. Inclined groove; 49. Spring plate; 410. Limit block; 411. Through hole; 412. Cylinder; 5. Positioning assembly; 51. Slider; 52. Square plate; 53. Round plate; 54. Round hole; 6. Drive motor; 7. Electric motor; 8. Square hole; 9. Screw. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0037] The first embodiment, as Figures 1 to 5 As shown, the present invention provides a technical solution: a laser welding device and welding process for a rear longitudinal beam energy absorption box, comprising a base 1, a drive motor 6 is fixedly connected to the outside of the base 1, a square hole 8 is opened on the top of the base 1, a screw 9 is rotatably connected to the inside of the square hole 8, and the screw 9 passes through the square hole 8 and is fixedly connected to the drive motor 6;

[0038] The moving component 2 is fixedly mounted on the top of the base 1 and is located at the rear end of the square hole 8;

[0039] Welding assembly 3, welding assembly 3 is fixedly mounted on moving assembly 2;

[0040] The fixing component 4 is fixedly mounted on the top of the base 1. The fixing component 4 and the square hole 8 are located on the same vertical plane. The outer side of the fixing component 4 is fixedly connected to the motor 7.

[0041] Positioning assembly 5, the positioning assembly 5 is slidably connected to the square hole 8;

[0042] Among them, the welding assembly 3 includes a servo motor 31, the output end of the servo motor 31 is rotatably connected to a transmission member 32, the servo motor 31 is fixedly installed on the outside of the mobile assembly 2, and the end of the transmission member 32 away from the servo motor 31 is rotatably connected to a shaft 37, the shaft 37 is rotatably connected to the mobile assembly 2, the shaft 37 and the servo motor 31 are located on two adjacent surfaces of the mobile assembly 2, and the side of the shaft 37 close to the mobile assembly 2 is rotatably connected to a protective shell 33. The servo motor 31 is connected to an external power supply to work, and the servo motor 31 drives the shaft 37 to rotate through the transmission member 32, and the shaft 37 drives the circular The ring 36 rotates, and the circular ring 36 and the fixed ring 35 are squeezed relative to each other, so that the compression spring 34 is compressed and deformed by the pressure, so that the fixed ring 35 moves on the outside of the rotating shaft 37 in the direction away from the circular ring 36, so that the circular ring 36 drives the welding part 38 to rotate, and then the inclination angle of the welding part 38 is adjusted. After the adjustment, the servo motor 31 stops working, and under the elastic force of the compression spring 34, the fixed ring 35 is reset. At this time, the fixed ring 35 and the circular ring 36 are engaged with each other, and the welding part 38 stops rotating and deviating, which plays a self-locking role. The self-locking of the inclination angle can ensure the welding The components are always kept at the set precise tilt angle. The welding gun angle changes during the welding process, which will lead to uneven distribution of laser energy, and may cause problems such as uneven weld width and inconsistent penetration depth. The self-locking function effectively avoids this situation, thereby ensuring the stability of welding quality and improving the strength and sealing of the weld joint. A stable tilt angle is conducive to the formation of high-quality welds. When the angle is fixed, the laser energy can act evenly on the welding part, making the weld penetration, weld width and other parameters more uniform, reducing the occurrence of welding defects. The protective shell 33 is fixedly connected to the mobile component 2 Then, a compression spring 34 is fixedly connected to the outside of the protective shell 33, and a fixing ring 35 is fixedly connected to the end of the compression spring 34 away from the protective shell 33. A circular ring 36 is fixedly connected to the outside of the rotating shaft 37 near the fixing ring 35. The fixing ring 35 is slidably connected to the rotating shaft 37, and a welding part 38 is fixedly connected to the end of the rotating shaft 37 away from the moving component 2. The contact surface between the fixing ring 35 and the circular ring 36 is a gear meshing setting. By setting the meshing between the fixing ring 35 and the circular ring 36, the angle deviation of the welding gun due to external factors can be effectively prevented, ensuring that the welding work can be carried out normally under various working conditions.

[0043] The moving assembly 2 includes a transverse axis 21, which is fixedly installed on the top of the base 1. The top of the transverse axis 21 is slidably connected to the longitudinal axis 22, and the outer side of the longitudinal axis 22 is slidably connected to the moving axis 23. After the material is fixed, the longitudinal axis 22 moves on the transverse axis 21, the moving axis 23 moves on the longitudinal axis 22, and the moving plate 25 moves on the moving axis 23, so that it can move in three directions, so that the welding assembly 3 is moved to the welding position. The transverse axis 21, the longitudinal axis 22 and the moving axis 23 are arranged perpendicular to each other, and the outer side of the moving axis 23 is slidably connected to the moving plate 25. The top of the moving plate 25 is fixedly connected to the connecting belt 24, and the moving plate 25 is rotatably connected to the rotating shaft 37.

[0044] The second embodiment, based on the first embodiment, see Figure 6 As shown, the welding part 38 includes a fixed plate 381, which is fixedly connected to the rotating shaft 37. The bottom of the fixed plate 381 is fixedly connected to the welding gun 382, ​​and the outer side of the welding gun 382 is fixedly connected to the bracket 383. Since the energy absorption box is placed horizontally, welding is performed in the vertical direction at this time. When the moving component 2 drives the welding component 3 to move to the welding position, the limit plates 384 on both sides of the welding gun 382 are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position, which greatly reduces the position deviation of the welding gun caused by human operation errors or equipment vibrations, improves the quality of the welding joint, and reduces the probability of welding defects such as incomplete welding and welding deviation. The end of the bracket 383 is fixedly connected to the limit plate 384, and the number of the limit plates 384 is Two, two limit plates 384 are symmetrically arranged with the bracket 383 as the center, and the angle between the two limit plates 384 is a right angle. The limit plates 384 on both sides are vertically arranged. During the welding process, the welding gun will be subjected to various forces, and the contact between the limit plates on both sides and the material to be processed provides stable support and constraint for the welding gun, so that it can maintain a relatively static state during welding, reducing unnecessary shaking and displacement, and ensuring that the welding gun can stably act on the welding part, thereby making the parameters such as the depth of penetration and the width of the weld more uniform and stable, which is conducive to improving the welding quality. The fixed plate 381 is fixedly connected to the outside of the limit plate 384 with a side plate 386, and the side plate 386 is fixedly connected to the limit plate 384. The side of the limit plate 384 is fixedly connected to the side of the welding gun 382.

[0045] The third embodiment, based on the first and second embodiments, see Figures 7 to 11As shown, the fixing assembly 4 includes a support plate 41, which is fixedly mounted on the top of the base 1. A fixing seat 42 is fixedly connected to one side of the support plate 41 near the square hole 8. A through hole 411 is provided on the outside of the fixing seat 42. There are multiple through holes 411, and the multiple through holes 411 are evenly distributed with the fixing seat 42 as the center. A spring plate 49 is fixedly connected to the inside of the through hole 411. The spring plate 49 is L-shaped, and one end of the spring plate 49 is located inside the inclined groove 48. In the initial state, under the elastic force of the spring plates 49 on both sides, the spring plate 49 is squeezed between the inclined groove 48 and the moving block 47. Under the action of the squeezing force, the moving block 47 is located near The material to be processed is placed inside the fixed seat 42 in the middle of the round rod 43, and the energy absorbing box is sleeved on the outside of the round rod 43. The energy absorbing box contacts and squeezes the moving block 47, so that the moving block 47 moves away from the energy absorbing box, thereby clamping the material. Since the energy absorbing box is mostly irregular or cylindrical in shape, by setting the spring plate 49, multiple moving blocks 47 clamp the energy absorbing box in multiple directions, so that the clamping force can be evenly distributed, and then during the processing, the energy absorbing box is prevented from being displaced or shaken due to external force, which affects the processing accuracy and reduces the product quality. The internal sliding connection of the through hole 411 has The moving block 47 and the spring plate 49 are symmetrically arranged with the moving block 47 as the center. The moving block 47 is provided with an oblique groove 48 on one side close to the spring plate 49. The inner wall of the through hole 411 close to the oblique groove 48 is fixedly connected to the limit block 410. The limit block 410 is symmetrically arranged with the moving block 47 as the center. The inner wall of the through hole 411 is fixedly connected with a cylinder 412. The middle of the outer side of the moving block 47 is provided with a ring hole 46. The cylinder 412 is located inside the ring hole 46. The fixed seat 42 is fixedly connected to the motor 7. The motor 7 is connected to an external power supply to work. The motor 7 drives the fixed seat 42 to rotate, and the friction between the fixed sleeve 44 and the circular plate 53 drives the energy absorption box and the frame The frame rotates to weld the material. A round rod 43 is fixedly connected to the middle of the fixed seat 42. A return spring 45 is fixedly connected to the end of the round rod 43 away from the fixed seat 42. By setting the return spring 45, the energy absorption box is in close contact with the frame to prevent gaps or loose contact at the welding point, which will cause uneven filling of the welding molten pool and easily produce welding defects such as air holes, slag inclusions, and incomplete welding, thereby reducing the strength of the weld joint, affecting the energy absorption and force transmission performance of the energy absorption box at critical moments, and failing to ensure the collision safety of the vehicle. A fixed sleeve 44 is provided on the outer side of the round rod 43 near the return spring 45, and the fixed sleeve 44 is slidably connected to the round rod 43.

[0046] The positioning assembly 5 includes a slider 51, which is slidably connected to the inner wall of the square hole 8. The slider 51 is threadedly connected to the screw 9. The top of the slider 51 is fixedly connected to the square plate 52. The frame welded to the energy absorption box is placed on the circular plate 53. Bolts are placed inside multiple circular holes 54 on the side of the frame to position and fix the frame, which is convenient for loading and unloading. After the frame and the energy absorption box are placed, the drive motor 6 is connected to an external power supply to work. The drive motor 6 drives the screw 9 to rotate, and the screw 9 drives the slider 51 to move inside the square hole 8 toward the direction of the fixed assembly 4, so that the fixing sleeve 44 contacts the circular plate 53, thereby docking the energy absorption box and the frame. The inside of the square plate 52 is rotatably connected to the circular plate 53. A circular hole 54 is opened on the outside of the circular plate 53, and a threaded groove is provided inside the circular hole 54.

[0047] A laser welding process for a rear longitudinal beam energy absorption box includes the following steps:

[0048] S1. Fix the material. Place the material to be processed inside the fixed seat 42. The energy absorbing box is sleeved on the outside of the round rod 43. The energy absorbing box and the moving block 47 are in contact and squeezed. Under the elastic force of the spring plate 49, the multiple moving blocks 47 clamp the energy absorbing box in multiple directions.

[0049] S2. Angle adjustment: The servo motor 31 drives the rotating shaft 37 to rotate, and the rotating shaft 37 drives the circular ring 36 to rotate. The circular ring 36 and the fixed ring 35 are squeezed relative to each other, and the compression spring 34 is compressed and deformed, so that the fixed ring 35 moves away from the circular ring 36, so that the circular ring 36 drives the weldment 38 to rotate;

[0050] S3, moving and positioning, when the moving assembly 2 drives the welding assembly 3 to move to the welding position, the limiting plates 384 on both sides of the welding gun 382 are in contact with the two materials to be welded respectively, so that the welding gun can be accurately positioned at the welding position;

[0051] S4, welding the material. The motor 7 drives the fixing seat 42 to rotate. The friction between the fixing sleeve 44 and the circular plate 53 drives the energy absorbing box and the frame to rotate, thereby welding the material.

[0052] During use, the frame welded to the energy absorption box is placed on the circular plate 53, and the frame is positioned and fixed by placing bolts inside the multiple circular holes 54 on the side of the frame, which is convenient for loading and unloading. The material to be processed is placed inside the fixed seat 42, and the energy absorption box is sleeved on the outside of the round rod 43. The energy absorption box and the moving block 47 are in contact and squeezed, so that the moving block 47 moves away from the energy absorption box, thereby clamping the material. Since the energy absorption box is mostly irregular or cylindrical in shape, by setting the spring plate 49, multiple moving blocks 47 clamp the energy absorption box in multiple directions. After placing the frame and the energy absorption box, the external power supply of the drive motor 6 is used to work, and the drive motor 6 drives the screw 9 to rotate. The screw 9 drives the slider 51 to move inside the square hole 8 toward the fixed component 4, so that the fixing sleeve 44 contacts the circular plate 53, thereby docking the energy absorption box and the frame.

[0053] After the materials are fixed, the longitudinal axis 22 moves on the transverse axis 21, the movable axis 23 moves on the longitudinal axis 22, and the movable plate 25 moves on the movable axis 23, so that it can move in three directions, so that the welding assembly 3 is moved to the welding position, so that the limit plates 384 on both sides of the welding gun 382 are respectively in contact with the two materials to be welded, so that the welding gun can be accurately located at the welding position.

[0054] The motor 7 drives the fixing seat 42 to rotate, and through the friction between the fixing sleeve 44 and the circular plate 53, the energy absorbing box and the frame are driven to rotate, thereby welding the materials.

[0055] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A laser welding device for a rear longitudinal beam energy absorption box, characterized in that: include: A base (1), wherein the outer side of the base (1) is fixedly connected to a driving motor (6), a square hole (8) is provided on the top of the base (1), a screw (9) is rotatably connected inside the square hole (8), and the screw (9) passes through the square hole (8) and is fixedly connected to the driving motor (6); A moving component (2), the moving component (2) being fixedly mounted on the top of the base (1), the moving component (2) being located at the rear end of the square hole (8); A welding assembly (3), wherein the welding assembly (3) is fixedly mounted on the moving assembly (2); A fixing assembly (4), the fixing assembly (4) being fixedly mounted on the top of the base (1), the fixing assembly (4) and the square hole (8) being located on the same vertical plane, and the outer side of the fixing assembly (4) being fixedly connected to a motor (7); A positioning assembly (5), wherein the positioning assembly (5) is slidably connected to the square hole (8); The welding assembly (3) includes a servo motor (31), an output end of the servo motor (31) is rotatably connected to a transmission member (32), the servo motor (31) is fixedly mounted on the outside of the moving assembly (2), an end of the transmission member (32) away from the servo motor (31) is rotatably connected to a rotating shaft (37), the rotating shaft (37) is rotatably connected to the moving assembly (2), the rotating shaft (37) and the servo motor (31) are located on two adjacent surfaces of the moving assembly (2), and a side of the rotating shaft (37) close to the moving assembly (2) is rotatably connected to a protective shell (33). The protective shell (33) is fixedly connected to the moving assembly (2), the outer side of the protective shell (33) is fixedly connected to a compression spring (34), the end of the compression spring (34) away from the protective shell (33) is fixedly connected to a fixing ring (35), the outer side of the rotating shaft (37) close to the fixing ring (35) is fixedly connected to a circular ring (36), the fixing ring (35) is slidably connected to the rotating shaft (37), the end of the rotating shaft (37) away from the moving assembly (2) is fixedly connected to a welding piece (38), and the contact surface between the fixing ring (35) and the circular ring (36) is a gear meshing arrangement.

2. The rear longitudinal beam energy absorption box laser welding equipment according to claim 1, characterized in that: The movable assembly (2) includes a transverse shaft (21), the transverse shaft (21) is fixedly mounted on the top of the base (1), the top of the transverse shaft (21) is slidably connected to the longitudinal shaft (22), the outer side of the longitudinal shaft (22) is slidably connected to the movable shaft (23), the transverse shaft (21), the longitudinal shaft (22) and the movable shaft (23) are arranged perpendicular to each other, the outer side of the movable shaft (23) is slidably connected to the movable plate (25), the top of the movable plate (25) is fixedly connected to the connecting belt (24), and the movable plate (25) is rotatably connected to the rotating shaft (37).

3. The laser welding equipment for rear longitudinal beam energy absorption box according to claim 2, characterized in that: The welding member (38) includes a fixing plate (381), the fixing plate (381) is fixedly connected to the rotating shaft (37), a welding gun (382) is fixedly connected to the bottom of the fixing plate (381), a bracket (383) is fixedly connected to the outside of the welding gun (382), and an end of the bracket (383) is fixedly connected to a limiting plate (384).

4. The rear longitudinal beam energy absorption box laser welding equipment according to claim 3, characterized in that: There are two limit plates (384), and the two limit plates (384) are symmetrically arranged with the bracket (383) as the center. The angle between the two limit plates (384) is a right angle. The fixing plate (381) is fixedly connected to the outer side of the limit plate (384) close to the side of the limit plate (384). The side plate (386) is fixedly connected to the limit plate (384). The limit plate (384) is fixedly connected to a bent plate (385) on one side close to the welding gun (382).

5. The rear longitudinal beam energy absorption box laser welding equipment according to claim 4, characterized in that: The fixing assembly (4) comprises a support plate (41), the support plate (41) being fixedly mounted on the top of the base (1), a fixing seat (42) being fixedly connected to a side of the support plate (41) close to the square hole (8), a through hole (411) being provided on the outer side of the fixing seat (42), and a plurality of the through holes (411) being evenly distributed around the fixing seat (42).

6. The rear longitudinal beam energy absorption box laser welding equipment according to claim 5, characterized in that: The through hole (411) is fixedly connected to a spring plate (49), and the through hole (411) is slidably connected to a moving block (47). The spring plate (49) is symmetrically arranged with the moving block (47) as the center, and a slanted groove (48) is provided on a side of the moving block (47) close to the spring plate (49).

7. The rear longitudinal beam energy absorption box laser welding equipment according to claim 6, characterized in that: The through hole (411) is fixedly connected to the inner wall of the inclined groove (48) with a limiting block (410), and the limiting block (410) is symmetrically arranged with the moving block (47) as the center. The inner wall of the through hole (411) is fixedly connected to a cylinder (412), and an annular hole (46) is opened in the middle of the outer side of the moving block (47), and the cylinder (412) is located inside the annular hole (46).

8. The rear longitudinal beam energy absorption box laser welding equipment according to claim 7, characterized in that: The fixing seat (42) is fixedly connected to the motor (7), a round rod (43) is fixedly connected to the middle of the fixing seat (42), an end of the round rod (43) away from the fixing seat (42) is fixedly connected to a return spring (45), and a fixing sleeve (44) is provided on the outer side of the round rod (43) close to the return spring (45), and the fixing sleeve (44) is slidably connected to the round rod (43).

9. The rear longitudinal beam energy absorption box laser welding equipment according to claim 1, characterized in that: The positioning assembly (5) includes a slider (51), the slider (51) is slidably connected to the inner wall of the square hole (8), the slider (51) is threadedly connected to the screw (9), the top of the slider (51) is fixedly connected to a square plate (52), the inside of the square plate (52) is rotatably connected to a circular plate (53), and the outer side of the circular plate (53) is provided with a circular hole (54).

10. A laser welding process for a rear longitudinal beam energy absorption box, characterized in that: It includes the following steps: S1. Fixing the material: placing the material to be processed inside the fixed seat (42); the energy absorbing box is sleeved on the outside of the round rod (43); the energy absorbing box and the moving block (47) are in contact and squeezed; under the elastic force of the spring plate (49), the multiple moving blocks (47) clamp the energy absorbing box in multiple directions; S2, angle adjustment, the servo motor (31) drives the rotating shaft (37) to rotate, the rotating shaft (37) drives the ring (36) to rotate, the ring (36) and the fixed ring (35) are relatively squeezed, the compression spring (34) is compressed and deformed, so that the fixed ring (35) moves away from the ring (36), and the ring (36) drives the weldment (38) to rotate; S3, moving and positioning, when the moving assembly (2) drives the welding assembly (3) to move to the welding position, the limiting plates (384) on both sides of the welding gun (382) are respectively in contact with the two materials to be welded, so that the welding gun can be accurately positioned at the welding position; S4, welding the material, the motor (7) drives the fixed seat (42) to rotate, and through the friction between the fixed sleeve (44) and the circular plate (53), the energy absorption box and the frame are driven to rotate, thereby welding the material.

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